Pfaff 571 User manual

INSTRUCTION MANUAL
296-12-19 195/002
Betriebsanleitung engl. 05.12
This instruction manual applies to machines
from the following serial numbers onwards:
# 6 500 120
571
574
591

This Instruction Manual is valid for all models and subclasses listed in the
chapter "Specifications".
The adjustment manual for the machines can be downloaded free of
charge from the internet address
www.pfaff-industrial.com/pfaff/de/service/downloads
As an alternative to the internet download the adjustment manual can also be
ordered in book form under part no. 296-12-19 196/002.
The reprinting, copying or translation of PFAFF Instruction Manuals, whether in whole or
in part, is only permitted with our previous authorization and with written reference to the
source.
PFAFF Industriesysteme
und Maschinen AG
Hans-Geiger-Str. 12 - IG Nord
D-67661 Kaiserslautern

Index
Contents ..................................................................................Page
3
1Safety .................................................................................................................................... 5
1.01 Directives...............................................................................................................................5
1.02 General notes on safety......................................................................................................... 5
1.03 Safety symbols ...................................................................................................................... 6
1.04 Important points for the user................................................................................................. 6
1.05 Operating and specialist personnel........................................................................................ 7
1.05.01 Operating personnel .............................................................................................................. 7
1.05.02 Specialist personnel............................................................................................................... 7
1.06 Gefahrenhinweise.................................................................................................................. 8
2Proper use............................................................................................................................. 9
3Specifications ..................................................................................................................... 10
3.01 PFAFF 571, 574, 591 ............................................................................................................ 10
3.02 Needles and threads............................................................................................................ 11
3.03 Possible models and subclasses ......................................................................................... 11
4Disposal of Machine .......................................................................................................... 12
5Transportation, packing and storage ................................................................................ 13
5.01 Transportation to customer‘s premises ............................................................................... 13
5.02 Transportation inside the customer‘s premises................................................................... 13
5.03 Disposal of packing materials ..............................................................................................13
5.04 Storage ................................................................................................................................ 13
6Explanation of symbols..................................................................................................... 14
7Controls .............................................................................................................................. 15
7.01 On/off switch ....................................................................................................................... 15
7.02 Keys on the machine head (only for machines with -911/..) ................................................. 15
7.03 Pedal .................................................................................................................................... 16
7.04 Lever for lifting roller presser ...............................................................................................16
7.05 Knee lever ............................................................................................................................ 17
7.06 Key for setting stitch length ................................................................................................. 17
7.07 Swing out roller presser....................................................................................................... 18
7.08 Control panel (Option).......................................................................................................... 18
7.09 Edge trimmer -725/04 for 571.............................................................................................. 19
7.10 Edge trimmer -725/04 for 574 and 591 ................................................................................ 20
8Installation and commissioning ....................................................................................... 21
8.01 Installation............................................................................................................................ 21
8.01.01 Adjusting the table-top height.............................................................................................. 21
8.01.02 Fitting the tilt lock................................................................................................................. 22
8.01.03 Fitting the machine cover..................................................................................................... 22
8.02 Mounting the flange motor.................................................................................................. 23
8.02.01 Mounting the flange motor to the bearing plate.................................................................. 23

Index
Contents ..................................................................................Page
4
8.02.02 Mounting the flange motor to the machine ......................................................................... 23
8.02.03 Mounting the toothed belt and adjusting the tension.......................................................... 24
8.02.04 Mounting the belt guard of the flange motor ...................................................................... 24
8.03 Connecting the plug-in connections and earth cables ......................................................... 25
8.04 Connecting the safety switch .............................................................................................. 26
8.05 Checking the start inhibitor function .................................................................................... 26
8.06 Fitting the reel stand ............................................................................................................ 27
8.07 Commissioning .................................................................................................................... 27
8.08 Switching the machine on/off ..............................................................................................27
8.09 Basic position of the machine drive unit ............................................................................. 28
8.09.01 On machines with PicoDrive and control unit P44 PD-L ...................................................... 28
8.09.02 On machines with drive system MD-4-57-220-CE .............................................................. 29
8.10 Secure the parameter values (drive system MD-4-57-220-CE) ........................................... 29
8.11 Reload the saved parameter values (Drive MD-4-57-220-CE) ............................................. 30
9Setting up ........................................................................................................................... 31
9.01 Inserting the needle............................................................................................................. 31
9.02 Winding the bobbin thread, adjusting the thread tension.................................................... 32
9.03 Removing/Inserting the bobbin case ................................................................................... 33
9.04 Threading the bobbin case/Adjusting the bobbin thread tension......................................... 33
9.05 Threading the needle thread and regulating its tension on model 571 and 591.................. 34
9.06 Threading the needle thread and regulating its tension on model 574 ................................ 35
9.07 Setting the stitch length....................................................................................................... 36
10 Care and maintenance....................................................................................................... 37
10.01 Servicing and maintenance intervals ................................................................................... 37
10.02 Cleaning .............................................................................................................................. 37
10.03 Oiling the hook..................................................................................................................... 38
10.04 Oil bowl for hook lubrication ................................................................................................ 38
10.05 Lubricating the bevel gears.................................................................................................. 39
10.06 Oilling the oil reservoir of the thread lubrication unit ........................................................... 40
10.07 Parameter settings............................................................................................................... 40
10.07.01 Parameter list for PicoDrive and control P44 PD-L............................................................... 41
10.07.02 Parameter list for control MD-4-57-220-CE .......................................................................... 42
11 Table top cutout and tilted work base .............................................................................. 43
11.01 Table top cutout (on machines with drive MJ-0-00-215-CE)................................................. 43
11.02 Table top cutout (on machines with drive MJ-0-00-215-CE P44 PD and MD-4-57-220-CE) .... 43
11.03 Tilted work base................................................................................................................... 44
11.04 Mounting the table top (on machines with drive MJ-0-00-215-CE)...................................... 45
11.05 Mounting the table top (on machines with drive P44 PD and MD-4-57-220-CE) ................. 46
12 Block diagram..................................................................................................................... 47
13 Wearing parts ..................................................................................................................... 50

5
Safety
1 Safety
1.01 Directives
This machine is constructed in accordance with the European regulations contained in the
conformity and manufacturer’s declarations.
In addition to this Instruction Manual, also observe all generally accepted, statutory and
other regulations and legal requirements and all valid environmental protection regulations!
The regionally valid regulations of the social insurance society for occupational accidents or
other supervisory organizations are to be strictly adhered to!
1.02 General notes on safety
●This machine may only be operated by adequately trained operators and only after having
completely read and understood the Instruction Manual!
●All Notes on Safety and Instruction Manuals of the motor manufacturer are to be read be-
fore operating the machine!
●The danger and safety instructions on the machine itself are to be followed!
●This machine may only be used for the purpose for which it is intended and may not be
operated without its safety devices. All safety regulations relevant to its operation are to
be adhered to.
●When exchanging sewing tools (e.g. needle, roller presser, needle plate and bobbin),
when threading the machine, when leaving the machine unattended and during mainte-
nance work, the machine is to be separated from the power supply by switching off the
On/Off switch or by removing the plug from the mains!
●Everyday maintenance work is only to be carried out by appropriately trained personnel!
●Repairs and special maintenance work may only be carried out by qualified service staff
or appropriately trained personnel!
●Work on electrical equipment may only be carried out by appropriately trained personnel!
●Work is not permitted on parts and equipment which are connected to the power supply!
The only exceptions to this rule are found in the regulations EN 50110.
●Modifications and alterations to the machine may only be carried out under observance
of all the relevant safety regulations!
●Only spare parts which have been approved by us are to be used for repairs! We express-
ly point out that any replacement parts or accessories which are not supplied by us have
not been tested and approved by us. The installation and/or use of any such products can
lead to negative changes in the structural characteristics of the machine. We are not liable
for any damage which may be caused by non-original parts.

6
Safety
1.03 Safety symbols
Danger!
Points to be observed.
Danger of injury for operating and specialist personnel!
Caution
Do not operate without finger guard and safety devices.
Before threading, changing bobbin and needle, cleaning
etc. switch off main switch.
1.04 Important points for the user
●This Instruction Manual is an integral part of the machine and must be available to the
operating personnel at all times.
●The Instruction Manual must be read before operating the machine for the first time.
●The operating and specialist personnel is to be instructed as to the safety equipment of
the machine and regarding safe work methods.
●It is the duty of the user to only operate the machine in perfect running order.
●It is the obligation of the user to ensure that none of the safety mechanisms are removed
or deactivated.
●It is the obligation of the user to ensure that only authorized persons operate and work
on the machine.
Further information can be obtained from your PFAFF agent.
I

7
Safety
1.05 Operating and specialist personnel
1.05.01 Operating personnel
Operating personnel are persons responsible for the equipping, operating and cleaning of
the machine as well as for taking care of problems arising in the sewing area.
The operating personnel is required to observe the following points and must:
●always observe the Notes on Safety in the Instruction Manual!
●never use any working methods which could adversely affect the safety of the machine!
●not wear loose-fitting clothing or jewelery such as chains or rings!
●also ensure that only authorized persons have access to the potentially dangerous area
around the machine!
●always immediately report to the person responsible any changes in the machine which
may limit its safety!
1.05.02 Specialist personnel
Specialist personnel are persons with a specialist education in the fields of electrics, electro-
nics and mechanics. They are responsible for the lubrication, maintenance, repair and adjust-
ment of the machine.
The specialist personnel is obliged to observe the following points and must:
●always observe the Notes on Safety in the Instruction Manual!
●switch off the On/Off switch before carrying out adjustments or repairs, and ensure that
it cannot be switched on again unintentionally!
●wait until the luminous diode on the control box is no longer blinking or on before begin-
ning adjustment or repair work.
●never work on parts which are still connected to the power supply! Exceptions are explai-
ned in the regulations EN 50110.
●replace the protective coverings and close the electrical control box afer all repairs or
maintenance work!

8
Safety
Switch the machine off before tilting it backwards!
Danger of injury if the machine is started accidentally!
Do not operate the machine without its take-up-lever guard 2!
Danger of injury due to the motion of the take-up lever!
On machines with thread lubricator, only operate the machine with the eye
guard 3lowered! The eye guard 3protects the eyes from oil particles from the
thread lubrication.
Do not operate the machine without belt guard 4!
Danger of injury by rotating drive belt!
Do not operate the machine without tilt lock 5!
Danger of crushing between sewing head and table top!
1.06 Gefahrenhinweise
A working area of 1mmust be kept free both in front of and behind the machi-
ne, so that easy access is possible at all times.
Never put your hands or fingers in the sewing area during sewing!
Danger of injury by the needle!
While setting or adjusting the machine do not leave any objects on the table nor
in the needle plate area! Objects may be trapped or flung out of the machine!
Do not operate the machine without support 1! Danger due to top-heavy
sewing head! Machine can tip over backwards when tilted!
Fig. 1 - 01
129-030
2
3
63-021
1
4
5

Proper use
9
2 Proper use
The PFAFF 571 is a single needle, high-speed post bed sewing machine (post to the left
of the needle) with driven feed wheel and roller presser and synchronized
needle.
The PFAFF 574 is a two-needle, high-speed post bed sewing machine with driven feed
wheel and roller presser
The PFAFF 591 is a single needle, high-speed post bed sewing machine (post to the right
of the needle) with driven feed wheel and roller presser and synchronized
needle.
The machines are used for sewing lockstitch seams in the leather and upholstery industries.
Any and all uses of this machine which have not been approved of by the
manufacturer are considered to be inappropriate! The manufacturer cannot be
held liable for any damage caused by the inappropriate use of the machine!
The appropriate use of the machine includes the observance of all operational,
adjustment, maintenance and repair measures required by the manufacturer!

Specifications
10
3 Specifications ▲
3.01 PFAFF 571, 574, 591
Stitch type:..........................................................................................................301 (lockstitch)
Clearance under roller presser:.........................................................................................7 mm
Clearance width: ...........................................................................................................245 mm
Clearance height: .......................................................................................................... 115 mm
Post height:...................................................................................................................180 mm
Sewing head dimensions:
Length:............................................................................................................. approx. 615 mm
Width: .............................................................................................................. approx. 240 mm
Height (above table): ........................................................................................approx. 500 mm
Bedplate dimensions: ......................................................................................... 518 x 177 mm
Max. speed:
Model B .................................................................................................................. 3000 spm ◆
Model C ................................................................................................................ 2000 spm ◆
Cutting depth (for –725/..): ....................................................................................0.8 – 2.5 mm
Cutting speed (for –725/..):................................................................................. 2800 cuts/min.
Motor data: .................................................................... See instruction manual for the motor
Noise data:
Emission sound level at the workplace at appropriate speed
(Noise measurement in accordance with DIN 45 635-48-A-1, ISO 11204, ISO 3744, ISO 4871)
PFAFF 571 and 591, model B at a speed of 2400 spm.:...................................LpA = 79 dB(A) ■
PFAFF 574, model C at a speed of 1600 spm.: .................................................LpA = 75 dB(A) ■
PFAFF 571 and 591, model C at a speed of 1600 spm.:...................................LpA = 73 dB(A) ■
Net weight of sewing head:..................................................................................approx. 61 kg
Gross weight of sewing head: ..............................................................................approx. 71 kg
▲Subject to alteration
◆Dependent on material, work operation and stitch length
■KpA = 2,5 dB

Specifications
11
3.03 Possible models and subclasses
Model B ..........................................................................For sewing medium-weight materials
Model C ........................................................................... For sewing medium-heavy materials
Additional equipment:
Subclass -725/04.................................................................................................. Edge trimmer
Subclass -900/83............................................................................................... Thread trimmer
Subclass -910/17 ........................................................................... Automatic presser foot lifter
Subclass -911/37 ......................................................................................................... Bartacker
Subclass -940/02.......................................................Needle plate rounded in sewing direction
3.02 Needles and threads
Model
Thread
thicknesss (Nm)
max. synthetic ▲
Needle thick-
ness in 1/100
mm
Needle
system
for PFAF 571
Needle
system
for PFAF 574
Needle
system
for PFAF 591
B40/3 100 134 134 134
C15/3 130 134 134 134
▲or similar strengths of other types of thread

Disposal of Machine
12
4 Disposal of Machine
●Proper disposal of the machine is the responsibility of the customer.
●The materials used for the machine are steel, aluminium, brass and various plastic
materials. The electrical equipment comprises plastic materials and copper.
●The machine is to be disposed of according to the locally valid pollution control regula-ti-
ons; if necessary, a specialist ist to be commissioned.
Care must be taken that parts soiled with lubricants are disposed of separately
according to the locally valid pollution control regulations!

Transportation, packing and storage
13
5 Transportation, packing and storage
5.01 Transportation to customer‘s premises
The machines are delivered completely packed.
5.02 Transportation inside the customer‘s premises
The manufacturer cannot be made liable for transportation inside the customer‘s premises
nor to other operating locations. It must be ensured that the machines are only transported
in an upright position.
5.03 Disposal of packing materials
The packing materials of this machine comprise paper, cardboard and VCE fibre. Proper dis-
posal of the packing material is the responsibility of the customer.
5.04 Storage
If the machine is not in use, it can be stored as it is for a period of up to six months, but It
should be protected against dust and moisture.
If the machine is stored for longer periods, the individual parts, especially the surfaces of
moving parts, must be protected against corrosion, e.g. by a film of oil.

Explanation of symbols
14
6 Explanation of symbols
In this instruction manual, work to be carried out or important information is accentuated by
symbols. These symbols have the following meanings:
Note, information
Cleaning, care
Lubrication
Maintenance, repairs, adjustment, service work
(only to be carried out by technical staff)

15
Controls
7.02 Keys on the machine head (only for machines with -911/..)
●As long as key 1 is pressed during
sewing, the machine sews in reverse.
●Keys 2 can be used for parameter
settings (see parameter 446 and 748 on
PicoDrive P44 PD2 or 221 and 145 on
MD-4-57-220-CE ).
7 Controls
7.01 On/off switch
Fig. 7 - 01
1
77-005
●The power supply to the machine is swit-
ched on or off by turning switch 1.
Fig. 7 - 02
2
1

16
Controls
7.04 Lever for lifting roller presser
●The roller presser can be raised by tur-
ning lever 1.
61-006
Fig. 7 - 04
1
Fig. 7 - 03
7.03 Pedal
0 = Neutral position
+1 = Sewing
-1 = Raise roller presser (on
machines with -910/..)
-2 = Trim sewing threads (on
machines with -900/..)
-1
+1
0
-2

17
Controls
7.05 Knee lever
●The roller presser can be raised by pres-
sing the knee lever 1 in the direction of
the arrow.
Fig. 7 - 05
63-018
1
7.06 Key for setting stitch length
●The stitch length is set by pressing key 1
and turning the balance wheel (see Chap-
ter 9.07 Setting the stitch length).
6
1-007
Fig. 7 - 06
1

18
Controls
7.07 Swing out roller presser
●When the roller presser is raised, it can
be swung out by pulling it lightly down-
wards.
129-033
Fig. 7 - 07
1
7.08 Control panel (Option)
The description can be found in the separate instruction manual for the control motor.

19
Controls
61-070
Fig. 7 - 09
7.09 Edge trimmer -725/04 for 571
Keep your hands away from the
moving knife! Danger of injury!
Switch on knife drive:
●Move lever 1 backwards. The knife
moves into operating position.
Switch off knife drive:
●Press lever 1. The knife swings back-
wards.
Switch on edge guide:
●Swing edge guide 2 into position by
hand and press lever 3. The edge guide 2
moves into its operating position.
Switch off edge guide:
●Raise edge guide 2 and let it click into po-
sition. The edge guide 2 is out of opera-
tion.
●Raise lever 4. The edge guide swings
backwards.
Changing the knife:
The following work may only be carried out by technical staff or by persons who
have been properly instructed.
●Switch off the machine.
●Loosen screw 5 and remove knife 6.
●Insert new knife and slightly tighten screw 5.
●Adjust the knife according to Chaper 1.05.05 Cutting stroke in the Adjustment Manual
and tighten screw 5.
1
3
24
5
6

20
Controls
7.10 Edge trimmer -725/04 for 574 and 591
61-008
Fig. 7 - 10
1
3
2
4
Keep your hands away from the moving knife! Danger of injury!
Switch on knife drive:
●Move lever 1 backwards. The knife moves into operating position.
Switch off knife drive:
●Press lever 1. The knife swings backwards.
Switch on edge guide:
●Swing edge guide 2 into position by hand and press lever 3. The edge guide 2 moves into
its operating position.
Switch off edge guide:
●Raise edge guide 2 and let it click into position. The edge guide 2 is out of operation.
●Raise lever 4. The edge guide swings backwards.
Changing the knife:
The following work may only be carried out by technical staff or by persons who
have been properly instructed.
●Switch off the machine.
●Loosen screw 5 and remove knife 6.
●Insert new knife and push it close to needle plate insert 7.
●Slightly tighten screw 5.
●Adjust the knife according to Chaper 1.05.07 Knife position in the Adjustment Manual
and tighten screw 5.
61-083
6
75